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pixman: implement read pixels

This commit is contained in:
Simon Zeni 2021-04-27 12:17:15 -04:00 committed by Simon Ser
parent 30706b71fb
commit 144b41a45c
1 changed files with 29 additions and 0 deletions
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29
render/pixman/renderer.c
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@ -380,6 +380,34 @@ static uint32_t pixman_preferred_read_format(
return get_drm_format_from_pixman(pixman_format);
}
static bool pixman_read_pixels(struct wlr_renderer *wlr_renderer,
uint32_t drm_format, uint32_t *flags, uint32_t stride,
uint32_t width, uint32_t height, uint32_t src_x, uint32_t src_y,
uint32_t dst_x, uint32_t dst_y, void *data) {
struct wlr_pixman_renderer *renderer = get_renderer(wlr_renderer);
struct wlr_pixman_buffer *buffer = renderer->current_buffer;
pixman_format_code_t fmt = get_pixman_format_from_drm(drm_format);
if (fmt == 0) {
wlr_log(WLR_ERROR, "Cannot read pixels: unsupported pixel format");
return false;
}
const struct wlr_pixel_format_info *drm_fmt =
drm_get_pixel_format_info(drm_format);
assert(drm_fmt);
pixman_image_t *dst = pixman_image_create_bits_no_clear(fmt, width, height,
data, stride);
pixman_image_composite32(PIXMAN_OP_SRC, buffer->image, NULL, dst,
src_x, src_y, 0, 0, dst_x, dst_y, width, height);
pixman_image_unref(dst);
return true;
}
static const struct wlr_renderer_impl renderer_impl = {
.begin = pixman_begin,
.clear = pixman_clear,
@ -392,6 +420,7 @@ static const struct wlr_renderer_impl renderer_impl = {
.bind_buffer = pixman_bind_buffer,
.destroy = pixman_destroy,
.preferred_read_format = pixman_preferred_read_format,
.read_pixels = pixman_read_pixels,
};
struct wlr_renderer *wlr_pixman_renderer_create(void) {